diff --git a/include/types.h b/include/types.h
index 79b267ba42cb4eba5803cab8cf5574bb50098d17..154fdb709ba38be87c15099a10d70a5441bb4cce 100644
--- a/include/types.h
+++ b/include/types.h
@@ -3,6 +3,8 @@
 
 /* Define types for GPG code */
 
+#warning Don't use include/types.h
+
 #include "lsh_types.h"
 
 typedef UINT8 byte;
diff --git a/util.h b/util.h
index cb25c8509f5f6cf2430639ed92ed8cb2e79b774c..f45105579aaa573213043dec9361bcd00b391d73 100644
--- a/util.h
+++ b/util.h
@@ -1,6 +1,8 @@
 #ifndef _UTIL_H
 #define _UTIL_H
 
+#warning Don't use lib/util.h
+
 /* Bridge from GPG style to lsh style */
 #include "lsh_types.h"